b1

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

/*Function prototype*/
void input(int *num, int *den); // input numerator (num) and denominator of a fraction (den)
void display(int num, int den); // display the fraction
void simplify(int *num, int *den); // simplify the fraction

void input(int *num, int *den)
{
    printf("Enter numerator: ");
    scanf("%d",num);
    do
    {
        printf("Enter denominator: ");
        scanf("%d",den);
    }
    while( *den==0);

}

void display(int num, int den)
{
    printf("%d/%d",num,den);
}
void simplify(int *num, int *den)
{
    int m;
    if (*num>*den) m=*num;
    else m=*den;
    int i;
    for (i=m; i>1; i--)
    {
        if(*num%i==0 && *den%i==0 )
        {
            *num=*num/i;
            *den=*den/i;
        }

    }
    if (*num>0 && *den<0)
    {
        *num*=-1;
        *den*=-1;
    }
    printf("%d/%d\n",*num,*den);

}

int main(int argc,char * argv[])
{
    int n,d,*pn,*pd;
    pn=&n;
    pd=&d;
    char c;
    do
    {
        c=0;
        printf("1. Input fraction\n\n");
        input(&n,&d);
        fflush(stdin);
        printf("2. Simplify fraction\n\n");
        display(n,d);
        printf("\n = \n");
        simplify(&n,&d);
        while (c!='n' && c!='y')
        {
            printf("Another run?(y/n)  ");
            c=getchar();
        }


    }
    while (c=='y');

    return 0;
}